What are research peptides?
Research peptides are lab-made peptides sold online with labels like “for research use only” or “not for human consumption.” Common examples are BPC-157, TB-500, MOTS-c and unapproved versions of weight loss drugs like retatrutide.
They usually come as a freeze-dried powder in a small vial that has to be mixed with bacteriostatic water.
What does “research use only” mean?
It means the product is sold for laboratory experiments, not for people or animals. The label lets sellers avoid the rules for medicines, which require proof of safety, effectiveness and quality.
In practice many buyers inject them, and the FDA has sent warning letters to sellers who market them for human use anyway.
Are research peptides legal?
Selling peptides for lab research is generally legal in the US, but selling or promoting them for human use is not. See are peptides legal? for how approved, compounded and research peptides differ.
Many research peptides are also banned in sport, and athletes have tested positive after using them.
What are the risks of research peptides?
The main risks are not knowing what is in the vial and not knowing what the peptide does in people. Independent tests of products sold online have found wrong amounts, impurities, bacterial toxins and sometimes a different substance.
On top of that, most research peptides have never been tested in proper human trials, so their side effects and long-term risks are unknown.
How can you judge research peptide claims?
Ask what kind of evidence is behind a claim. A result in cells or rats is a starting point, not proof it works in people; a small study without a placebo group is weak; and a large randomized trial in people is strong.
Each peptide page on this site lists the human evidence, side effects and legal status with sources.
How do people measure research peptides?
Research peptides are usually mixed with bacteriostatic water, and the amount to draw is worked out in syringe units. The peptide calculator turns the vial size, the water and a dose into units, and the reconstitution guide explains each step.
Each peptide page lists doses only where a label or published trial gives one, with its source.